Question 084: Which martial art for me?

Choosing I trained for 4 years in Hapkido. I relocated and have been in Taekwondo for 2 years. What I want to learn from the martial arts is how to defend myself in any real life situation. I learned the basic kicks, pressure points, falling, hand and kicking defense, and point sparring. I have learned distance, decent footwork, as well as throwing multiple hand and kick combinations. I friends that are black belts in many different martial arts, and we meet once a week to teach each other what we know. I think that after 6 years in martial arts I should be much better at stand up fighting. Many of my friends that are in kickboxing are much better than I am, and they have not been training nearly as long. I am pretty good at Taekwondo sparring but when I put boxing gloves on and spar against other martial arts it is different? I think they are better because Kickboxing teaches straight punches, high and low, kicks to the thigh, punches to head, and mixing it up. They also teach more basic blocks which in my opinion work much better. In Taekwondo and Hapkido, we CANNOT kick to the legs or punch to the head when sparring. I realize this is for safety reasons and against Olympic rules, but it is not against the rules in a real fight. I realize I can still do these things in a real fight, but if we do not train it, then what? I hate this about traditional schools!! I have talked to my instructors and they say do not do this, or do this differently, in a real fight, so why are we learning it then? Am I at the wrong schools? Should I try MMA? I have learned some basic jujitsu, judo throw etc., from my friends and I like it but I like stand up fighting and I feel like I am not getting it in Taekwondo? Does it take longer? Should I stick with it? Should I cross train, such as Taekwondo for a while to work on footwork and kicks, boxing to work on punches, and Jujitsu to work on ground fighting, or should I stick with one style?